US3234301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfuric acid recovery process
Assignee: Texaco Inc
•
Filing: 1964-07-28
•
Granted: 1966-02-08
•
Expires: 1984-07-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Goldsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:42
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/868; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/92; C01B17/925; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR THE RECOVERY OF USED SULFURIC ACID ALKYLATION CATALYST CONTAINING ACID SOLUBLE OIL CONTAMINANTS AND WATER WHICH COMPRISES CONTACTING SAID USED SULFURIC ACID WITH PROPLENE FORMING A REACTION MIXTURE COMPRISING DIPROPYL SULFATE, ACID SOLUBLE OIL CONTAMINANTS AND WATER, CONTACTING SAID REACTION MIXTURE WITH ISOBUTANE CONDENSATE AS HEREINAFTER PROVIDED FORMING AN EXTRACT COMPRISING DIPROPYL SULFATE AND ISOBUTANE, AND A RAFFINATE COMPRISING AT LEAST A PORTION OF SAID ACID SOLUBLE OIL CONTAMINANTS AND WATER, CONTACTING SAID EXTRACT WITH SULFURIC ACID ALKYLATION CATALYST UNDER ALKYLATION CONDITIONS IN AN ALKYLATION ZONE COOLED BY THE EVAPORATION OF AT LEAST A PART OF THE REACTIN MIXTURE OF SAID ALKYLATION ZONE, FORMING AN ISOBUTANE RICH VAPOR, REMAINING HYDROCARBON LIQUID COMPRISING UNVAPORIZED ISOBUTANE AND ALKYLATE PRODUCT, AND CATALYST, CONDENSING SAID ISOBUTANE RICH VAPOR FORMING SAID ISOBUTANE RICH CONDENSATE, AND SEPARATING ALKYLATE PRODUCT FROM SAID REMAINING HYDROCARBON LIQUID.
Claim 2
Dependent Claim
141 words
A PROCESS FOR THE RECOVERY OF USED SULFURIC ACID ALKYLATION CATALYST CONTAINING ACID SOLUBLE OIL CONTAMINANTS AND WATER WHICH COMPRISES CONTACTING SAID USED SULFURIC ACID WITH PROPLENE FORMING A REACTION MIXTURE COMPRISING DIPROPYL SULFATE, ACID SOLUBLE OIL CONTAMINANTS AND WATER, CONTACTING SAID REACTION MIXTURE WITH ISOBUTANE CONDENSATE AS HEREINAFTER PROVIDED FORMING AN EXTRACT COMPRISING DIPROPYL SULFATE AND ISOBUTANE, AND A RAFFINATE COMPRISING AT LEAST A PORTION OF SAID ACID SOLUBLE OIL CONTAMINANTS AND WATER, CONTACTING SAID EXTRACT WITH SULFURIC ACID ALKYLATION CATALYST UNDER ALKYLATION CONDITIONS IN AN ALKYLATION ZONE COOLED BY THE EVAPORATION OF AT LEAST A PART OF THE REACTIN MIXTURE OF SAID ALKYLATION ZONE, FORMING AN ISOBUTANE RICH VAPOR, REMAINING HYDROCARBON LIQUID COMPRISING UNVAPORIZED ISOBUTANE AND ALKYLATE PRODUCT, AND CATALYST, CONDENSING SAID ISOBUTANE RICH VAPOR FORMING SAID ISOBUTANE RICH CONDENSATE, AND SEPARATING ALKYLATE PRODUCT FROM SAID REMAINING HYDROCARBON LIQUID.
References Cited (Backward Citations)
US2381041A
Cited
US3000994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |